From thehackernews.com
Late last year when an unknown group of hackers stole secret access tokens for millions of Facebook accounts by taking advantage of a flaw in its website, the company disclosed the incident and informed its affected users.
Similarly, when Twitter was hit by multiple vulnerabilities (#1, #2, #3) in the last few months, the social media company disclosed those incidents and informed its affected users.
And Guess What? Google is going to shut down its social media network Google+ in April this year after admitting two security flaws in its platform that exposed private data of hundreds of thousands of users to third-party developers.